<template>
    <div class="exam-page flex-col">
      <div class="exam-selected-section flex-col">
        <div class="exam-option-group flex-row justify-between">
          <div class="exam-option" v-for="option in options" :key="option.value" @click="selectOption(option.value)"
            :class="{ selected: selectedOption === option.value }">
            {{ option.label }}
          </div>
        </div>
        <div class="center-box">
          <span class="exam-list-title">推荐竞赛</span>
          <el-form inline="true" class="exam-navigation flex-row justify-between">
            <el-form-item label="竞赛时间" prop="datetimerange" class="exam-navigation-box">
              <el-date-picker style="width:360px;" v-model="params.datetimerange" type="datetimerange" range-separator="至"
                start-placeholder="开始时间" end-placeholder="结束时间"></el-date-picker>
            </el-form-item>
            <el-form-item>
              <el-button @click="onSearch" plain type="primary">搜索</el-button>
              <el-button @click="onReset" plain type="info">重置</el-button>
            </el-form-item>
          </el-form>
          <!-- </div> -->
          <div class="exam-list-group flex-row">
            <div class="exam-list-item flex-col" v-for="(exam, index) in examList" :key="index">
              <div>
                <img src="@/assets/images/exam.png">
              </div>
              <div class="right-info">
                <span class="exam-title">{{ exam.title }}</span>
                <div class="exam-content flex-col justify-between">
                  <span>开赛时间：{{ exam.startTime }}</span>
                  <span>结束时间：{{ exam.endTime }}</span>
                </div>
                <div class="exam-button-container">
                  <span class="exam-hash-entry" v-if="isOngoingAndUnregisteredCompetition(exam)">已开赛</span>
                  <span class="exam-hash-entry" v-if="isEntryAndNotStart(exam)">已报名</span>
                  <div v-if="isHistoryExam(exam)">
                    <el-button class="exam-practice-button" type="primary" plain
                      @click="goExam(exam)">竞赛练习</el-button>
                    <el-button class="exam-rank-button" type="primary" plain
                      @click="togglePopover(exam.examId)">查看排名</el-button>
                  </div>
                  <el-button class="exam-start-button" type="primary" plain v-if="isStartExam(exam)"
                    @click="goExam(exam)">开始答题</el-button>
                  <el-button class="exam-enter-button" type="primary" plain v-if="isCanEntry(exam)"
                    @click="enterExam(exam.examId)">报名参赛</el-button>
                </div>
              </div>
            </div>
          </div>
          <div class="exam-page-pagination flex-row">
            <el-pagination background layout="total, sizes, prev, pager, next, jumper" :total="total"
              v-model:current-page="params.pageNum" v-model:page-size="params.pageSize" :page-sizes="[3, 6, 9, 12]"
              @size-change="handleSizeChange" @current-change="handleCurrentChange" />
          </div>
        </div>
      </div>
    </div>
  
    <el-dialog v-model="dialogVisible" width="600px" top="30vh" :show-close="true" :close-on-click-modal="false"
      :close-on-press-escape="false" class="oj-login-dialog-centor" center>
      <el-table :data="examRankList">
        <el-table-column label="排名" prop="examRank" />
        <el-table-column label="用户昵称" prop="nickName" />
        <el-table-column label="用户得分" prop="score" />
      </el-table>
      <el-pagination class="range_page" background layout="total, sizes, prev, pager, next, jumper" :total="rankTotal"
        v-model:current-page="rankParams.pageNum" v-model:page-size="rankParams.pageSize" :page-sizes="[5, 10, 15, 20]"
        @size-change="handleRankSizeChange" @current-change="handleRankCurrentChange" />
    </el-dialog>
  
  </template>
  
  <script setup>
  import { reactive, ref } from 'vue'
  import { getExamListService,enterExamService, getExamRankListService } from '@/apis/exam'
  import { getToken } from '@/utils/cookie'
  import { getUserInfoService } from '@/apis/user'
  import router from '@/router';
  
  //参数定义
  const examList = ref([]) //题目列表
  const total = ref(0)
  const selectedOption = ref(0); // 初始化选中的文本
  const options = ref([
    { label: '未完赛', value: 0 },
    { label: '历史竞赛', value: 1 },
  ])
  const params = reactive({
    pageNum: 1,
    pageSize: 9,
    type: 0
  })
  
  //竞赛列表
  async function getExamList() {
    console.log(params)
    const result = await getExamListService(params)
    examList.value = result.rows
    total.value = result.total
  }
  getExamList()
  
  async function selectOption(type) {
    selectedOption.value = type
    params.pageNum = 1
    params.type = type
    getExamList()
  }
  
  // 搜索/重置
  function onSearch() {
    params.pageNum = 1
    getExamList()
  }
  
  function onReset() {
    params.pageNum = 1
    params.pageSize = 9
    params.type = 0
    getExamList()
  }
  
  // 分页
  function handleSizeChange(newSize) {
    params.pageNum = 1
    getExamList()
  }
  
  function handleCurrentChange(newPage) {
    getExamList()
  }
  
  function isOngoingAndUnregisteredCompetition(exam){
    const now = new Date(); //当前时间
    return new Date(exam.startTime) < now && new Date(exam.endTime) > now && !exam.enter
  }
  
  function isEntryAndNotStart(exam) {
    const now = new Date();
    return new Date(exam.startTime) > now && exam.enter
  }
  
  function isHistoryExam(exam) {
    const now = new Date();
    return new Date(exam.endTime) < now;
  }
  
  function isStartExam(exam) {
    const now = new Date();
    return new Date(exam.startTime) < now && new Date(exam.endTime) > now && exam.enter;
  }
  
  function isCanEntry (exam) {
    const now = new Date();
    return new Date(exam.startTime) > now && !exam.enter;
  }
  
  const isLogin = ref(false)
  async function checkLogin() {
    if (getToken()) {
      await getUserInfoService()
      isLogin.value = true
    }
  }
  
  async function enterExam(examId) {
    await checkLogin()
    if (!isLogin.value) {
      ElMessage.error('请先登录后报名参赛,谢谢')
      return
    }
    const enterExamDTO = ref({
      examId: examId
    })
    await enterExamService(enterExamDTO.value)
    ElMessage.success('您已报名成功，请按时参赛',)
    getExamList() //报名成功后刷新竞赛列表
  }
  
  function goExam(exam) {
    //需要后端提供一个获取竞赛中第一道题目的id接口
    router.push(`/c-oj/anwser?examId=${exam.examId}&examTitle=${exam.title}&examEndTime=${exam.endTime}`)
  }
  
  const rankParams = reactive({
    examId:'',
    pageNum: 1,
    pageSize: 9,
  })
  const examRankList = ref([])
  const rankTotal = ref(0)
  
  // 分页
  function handleRankSizeChange(newSize) {
    rankParams.pageNum = 1
    getExamRankList()
  }
  
  function handleRankCurrentChange(newPage) {
    getExamRankList()
  }
  
  const dialogVisible = ref(false)
  
  async function getExamRankList() {
    const result = await getExamRankListService(rankParams)
    examRankList.value = result.rows
    rankTotal.value = result.total
  }
  
  function togglePopover(examId) {
    dialogVisible.value = true
    rankParams.examId = examId
    getExamRankList()
  }
  
  </script>
  
  <style lang="scss" scoped>
  .exam-page {
    background-color: rgba(247, 247, 247, 1);
    position: relative;
    overflow: hidden;
    display: flex;
  
    .center-box {
      max-width: 1520px;
      margin: 0 auto;
      width: 100%;
      min-height: 368px;
      background: #FFFFFF;
      border-radius: 16px;
      padding: 0 20px;
      padding-top: 30px;
      margin-top: 10px;
    }
  
    .exam-selected-section {
      margin: 0 auto;
      margin-bottom: 20px;
      position: relative;
      padding-top: 50px;
      max-width: 1520px;
      width: 100%;
  
      .exam-option-group {
        width: fit-content;
        height: 50px;
        position: absolute;
        top: 0;
        left: 0;
  
        .exam-option {
          cursor: pointer;
          padding: 10px;
          border-bottom: 2px solid transparent;
          transition: all 0.3s ease;
          font-family: PingFangSC, PingFang SC;
          font-weight: 600;
          font-size: 18px;
          color: #222;
          height: 50px;
          width: fit-content;
          display: flex;
          justify-content: center;
          align-items: center;
          margin-right: 20px;
        }
  
        .exam-option.selected {
          color: #32C5FF;
          border-bottom: 2px solid #32C5FF;
        }
      }
  
      .exam-list-title {
        height: 24px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 600;
        font-size: 18px;
        color: #222222;
        line-height: 25px;
        text-align: left;
        margin-bottom: 30px;
        display: block;
      }
  
      :deep(.exam-navigation) {
        width: 554px;
        height: 40px;
        font-size: 100px;
        margin-bottom: 30px;
  
        .el-form-item {
          margin-right: 20px;
        }
  
        .el-form-item__label {
          background: #fff;
        }
  
        .exam-navigation-box {
          background-color: rgba(242, 243, 244, 1);
          border-radius: 6px;
          height: 30px;
          // width: 460px;
          font-weight: 700;
        }
      }
  
      .exam-list-group {
        // width: 1200px;
        flex-wrap: wrap;
  
        @media screen and (min-width: 1420px) {
          .exam-list-item {
            width: 32%;
  
            &:nth-of-type(3n) {
              margin-right: 0;
            }
          }
  
        }
  
        @media screen and (max-width: 1419px) {
          .exam-list-item {
            width: 48%;
            margin-right: 2%;
  
            &:nth-of-type(2n) {
              margin-right: 0;
            }
          }
        }
  
        @media screen and (max-width: 970px) {
          .exam-list-item {
            width: 100%;
            margin-right: 0;
          }
        }
  
        .exam-list-item {
          height: 220px;
          background: #F9F9F9;
          border-radius: 10px;
          margin-right: 2%;
          margin-bottom: 20px;
          padding: 20px;
          box-sizing: border-box;
          display: flex;
          align-items: center;
          flex-direction: row;
          justify-content: space-between;
          cursor: pointer;
  
          .right-info {
            width: calc(100% - 146px);
          }
  
          .exam-title {
            height: 26px;
            font-family: PingFangSC, PingFang SC;
            font-weight: 600;
            font-size: 18px;
            color: #222222;
            line-height: 26px;
            text-align: left;
            max-width: 90%;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            margin-bottom: 16px;
            display: block;
          }
  
          .exam-content {
            margin-bottom: 26px;
  
            span {
              height: 22px;
              font-family: PingFangSC, PingFang SC;
              font-weight: 400;
              font-size: 16px;
              color: #666666;
              line-height: 22px;
              display: block;
              margin-bottom: 12px;
            }
  
          }
  
          img {
            width: 126px;
            height: 180px;
            border-radius: 6px;
          }
  
          &:hover {
            background: #fff;
            box-shadow: 0px 0px 6px 0px rgba(0, 0, 0, 0.1);
  
            .exam-title {
              color: #32C5FF;
            }
  
            .el-button {
              background: #f7f7f7;
            }
          }
  
          .exam-hash-entry {
            float: right;
            font-size: 18px;
            font-family: PingFangSC-Regular, PingFang SC;
            font-weight: 400;
            color: #999;
          }
  
          .exam-button-container {
            display: flex;
            justify-content: space-between;
            /* 或者使用 flex-start 来紧密排列按钮 */
            align-items: center;
  
            /* 如果需要垂直居中 */
            /* 其他样式，如外边距、内边距等 */
            .el-button {
              width: 120px;
              height: 44px;
              background: #F7F7F7;
              border-radius: 4px;
              border: 1px solid #32C5FF;
              font-family: PingFangSC, PingFang SC;
              font-weight: 400;
              font-size: 18px;
              color: #32C5FF;
              line-height: 44px;
              text-align: center;
            }
          }
        }
      }
  
      .exam-page-pagination {
        width: 594px;
        height: 40px;
        margin: 30px 0 73px 800px;
      }
    }
  }
  </style>